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  1. #1
    Just Joined!
    Join Date
    Jan 2010
    The Sillicon Valley, California

    Does sock_sendmsg() buffer or block?

    We're using sock_sendmsg() to send from an embedded kernel module.
    Throughput is a big concern.

    Does sock_sendmsg() only return AFTER transmitting the data?

    Or, does it copy the data to a buffer, and return immediately (PREFERRED!!) ?

  2. #2
    Linux Guru Rubberman's Avatar
    Join Date
    Apr 2009
    I can be found either 40 miles west of Chicago, in Chicago, or in a galaxy far, far away.
    See this page, and follow the "Next in thread" link for more info.
    Linux-Kernel Archive: Suspected sock_sendmsg() with MSG_DONTWAIT can block bug.
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!

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